o1 vs o3 Pro
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
o3 Pro by OpenAI wins on 10 of 15 benchmarks against o1 by OpenAI, which leads on 4. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, o3 Pro scores 1410 on Chatbot Arena ELO compared to o1's 1360, while o3 Pro scores 86.0% on MMLU-Pro compared to o1's 82.0%.
Coding: In coding, o3 Pro scores 92.0% on HumanEval+ compared to o1's 89.0%, while o3 Pro scores 70.0% on SWE-bench Verified compared to o1's 48.9%, while o3 Pro scores 75.0% on LiveCodeBench compared to o1's 55.0%.
Math: In math, o3 Pro scores 97.0% on MATH compared to o1's 94.8%, while o3 Pro scores 99.0% on GSM8K compared to o1's 97.5%, while o3 Pro scores 98.4% on AIME 2025 compared to o1's 74.0%.
Reasoning: In reasoning, o3 Pro scores 85.0% on GPQA Diamond compared to o1's 77.3%, while o3 Pro scores 70.0% on ARC-AGI compared to o1's 32.0%.
Context: In context, both score 200K on Context Length.
Pricing Comparison
o1 costs $15.0/1M input tokens and $60.0/1M output tokens, while o3 Pro costs $20.0/1M input and $80.0/1M output. o1 is the more affordable option for API usage.
Speed Comparison
o1 generates output at 35 tok/s compared to o3 Pro's 25 tok/s, and the time to first token is 1000 ms for o1 versus 1200 ms for o3 Pro. o1 delivers faster throughput.
Verdict
For developers prioritizing affordability and speed, o1 has the edge. For those who value coding and general intelligence and math, o3 Pro is the stronger choice.
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o1 vs o3 Pro — FAQ
Which is better, o1 or o3 Pro?
o3 Pro wins on more benchmarks overall (10 vs 4). However, the best choice depends on your specific needs — each model excels in different areas.
How does o1 compare to o3 Pro for coding?
o3 Pro is better for coding, scoring 70.0% on SWE-bench Verified compared to 48.9%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is o1 cheaper than o3 Pro?
Yes, o1 is cheaper. o1 costs $15.0/1M input and $60.0/1M output tokens. o3 Pro costs $20.0/1M input and $80.0/1M output tokens.
Which is faster, o1 or o3 Pro?
o1 is faster, generating output at 35 tok/s compared to 25 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the o1 vs o3 Pro comparison cover?
This comparison covers 15 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, GPQA Diamond, SWE-bench Verified, Output Speed, LiveCodeBench, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.